Imported gcc-4.4.3

[msp430-gcc.git] / gcc / unwind-dw2.h

diff --git a/gcc/unwind-dw2.h b/gcc/unwind-dw2.h
new file mode 100644 (file)
index 0000000..2c558b4
--- /dev/null
+++ b/gcc/unwind-dw2.h
@@ -0,0 +1,87 @@
+/* DWARF2 frame unwind data structure.
+   Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2009
+   Free Software Foundation, Inc.
+
+   This file is part of GCC.
+
+   GCC is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   GCC is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+   License for more details.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* A target can override (perhaps for backward compatibility) how
+   many dwarf2 columns are unwound.  */
+#ifndef DWARF_FRAME_REGISTERS
+#define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
+#endif
+
+/* The result of interpreting the frame unwind info for a frame.
+   This is all symbolic at this point, as none of the values can
+   be resolved until the target pc is located.  */
+typedef struct
+{
+  /* Each register save state can be described in terms of a CFA slot,
+     another register, or a location expression.  */
+  struct frame_state_reg_info
+  {
+    struct {
+      union {
+       _Unwind_Word reg;
+       _Unwind_Sword offset;
+       const unsigned char *exp;
+      } loc;
+      enum {
+       REG_UNSAVED,
+       REG_SAVED_OFFSET,
+       REG_SAVED_REG,
+       REG_SAVED_EXP,
+       REG_SAVED_VAL_OFFSET,
+       REG_SAVED_VAL_EXP,
+       REG_UNDEFINED
+      } how;
+    } reg[DWARF_FRAME_REGISTERS+1];
+
+    /* Used to implement DW_CFA_remember_state.  */
+    struct frame_state_reg_info *prev;
+
+    /* The CFA can be described in terms of a reg+offset or a
+       location expression.  */
+    _Unwind_Sword cfa_offset;
+    _Unwind_Word cfa_reg;
+    const unsigned char *cfa_exp;
+    enum {
+      CFA_UNSET,
+      CFA_REG_OFFSET,
+      CFA_EXP
+    } cfa_how;
+  } regs;
+
+  /* The PC described by the current frame state.  */
+  void *pc;
+
+  /* The information we care about from the CIE/FDE.  */
+  _Unwind_Personality_Fn personality;
+  _Unwind_Sword data_align;
+  _Unwind_Word code_align;
+  _Unwind_Word retaddr_column;
+  unsigned char fde_encoding;
+  unsigned char lsda_encoding;
+  unsigned char saw_z;
+  unsigned char signal_frame;
+  void *eh_ptr;
+} _Unwind_FrameState;
+